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Encyclopedia Articles (5)

Volcanic Eruptions
A volcanic eruption is the release of molten rock and volcanic gases through Earth&#x0027;s crust to the surface. Molten rock within the earth, or magma, is driven to erupt by buoya...
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Volcanic Vent
Volcanic vents are openings in Earth&#x0027;s crust where molten lava and volcanic gases escape onto the land surface or into the atmosphere. Most volcanoes have a circular central vent ...
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Volcano
Volcanoes are vents or fissures in Earth&#x0027;s crust through which lava, gases, and pyroclastic debris are released. More commonly, the term volcano refers to the landform built up from the...
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Volcano
Volcanoes have been called the thermostat of the planet. They wreak havoc, but also spawn far-ranging benefits for soil and air. Some earth scientists now say that the vast swath of destruct...
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In many parts of the world, volcanoes rise like towers above the land, sitting quietly for hundreds, even thousands, of years. Many appear to be no more than snow-capped mountains, which vacationers a...
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Essays & Analysis (4)

Composite Volcanoes
Composite volcanoes are also known as strato volcanoes. Their formation consists of alternating layers of lava and rock. They occur along subduction zones and have many different...
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When we think of volcanoes, most of us picture a huge mountain with flames and smoke shooting out of the top. To many people, volcanoes are the most feared natural phenomenon on this planet. Howe...
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When magma beneath the Earth's surface is forced up through any opening in Earth's crust, it is called a volcano. Some pour or explode molten rock, ash, cinders, and poisonous gases. Volcanoes ar...
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Statement: The effects of volcanic activity can be on a local scale or a global scale.
Lava flows are usually fairly slow moving streams of molten rock which pour from vents in the erupting volcano a...
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